Horizontal Aggregation in SQL to Prepare Dataset for Generation of Decision Tree using C4.5 Algorithm in WEKA

In this paper we are taking a Database Table, a database is an organized collection of data. We are performing a Horizontal Aggregation on that particular Database Table; there are three methods from which we are performing Horizontal Aggregation. These three methods give us the output as the dataset of that particular database table. A Dataset is a collection of data, usually presented in tabular form. By providing these dataset as an input to the C 4.5 algorithm in WEKA, we are generating Decision tree for that database table. Three methods for Horizontal aggregation are SPJ, PIVOT and CASE. C4.5 is the Decision tree Generation Algorithm which generates Decision tree.